Gongli Xiao, Xiuhua Yang, Hongyan Yang, Wanying Dou, Junlin Xu, Qingchen Wei, Haiou Li, Fabi Zhang, Qi Li, Yonghe Chen, Tao Fu, Tangyou Sun. Plasma Refractive Index Sensor with Tunable Cross Tie-Shaped Graphene Array Structure[J]. Acta Optica Sinica, 2019, 39(7): 0728011